Not because you can't, but because the above are better apps and a nicer experience than the Apple equivalents.
Once you get out of Apple's walled garden (and reality distortion field), you might find you like it better.
The point here is about the missing features OS X on Darwin, not about alternatives that aren't native OS X.
I seem to be responding to your anti-Free Software posts everywhere in this thread.
I care about usable software and don't mind paying for developers for their work, they have to pay their bills.
